"I didn’t have a reaction to the news. The guy was insane. He tried to keep my father’s name off [Murphy's] death certificate," Bertolotti tells RadarOnline.com. "When I told my dad, Angelo, about the news, he felt he same way. We are sad for my sister — not for him."

Murphy died five months ago, and suspicions immediately surrounded Monjack, whom she wed in 2007. Her December death at 32 was later ruled to be caused by pneumonia complicated by an iron deficiency, anemia and multiple drug intoxication.

Continues Bertolotti of Monjack, who was found by Murphy's mother Sunday night, according to The Hollywood Reporter: "I wasn’t shocked to be honest." The Los Angeles Police Department has said it appears the British screenwriter, 39, died from natural causes.

“That’s two out of three people that have died living in that house within six months. When are people going to open their eyes about what was going on there?" said Bertolotti. "Our family thinks that this thing will still blow-up, and that the truth will eventually come-out about our sister."

Los Angeles County Assistant Chief Coroner Ed Winter told RadarOnline.com that Monjack was found in the master bedroom, and "there were no illicit drugs located — just prescription medications." He declined to name specific medications.